It is definitely an interesting problem, because Portugal is a small enough country that the actual total corpus of available texts in (non-Brazilian) Portuguese is potentially problematic.
European Portuguese is the 13th most populous language in Europe. Not that small, there are many other European languages in use that are much smaller. https://en.wikipedia.org/wiki/List_of_languages_by_number_of...
Don't get me wrong, it is definitely impressive given Portugal's actual size, but I believe there's a hard limit for population and size that will be difficult to cross
[1]: https://en.wikipedia.org/wiki/List_of_countries_by_number_of...